计算机工程与设计
計算機工程與設計
계산궤공정여설계
COMPUTER ENGINEERING AND DESIGN
2010年
3期
498-500,517
,共4页
最大竞争窗口%重传次数%吞吐量%丢包率%退避机制
最大競爭窗口%重傳次數%吞吐量%丟包率%退避機製
최대경쟁창구%중전차수%탄토량%주포솔%퇴피궤제
largest contention window%retry limit%throughput%packet drop rate%backoffmechanism
针对IEEE802.11的媒体接入控制层QoS支持技术进行了研究.基于无线局域网MAC层DCF和EDCF两种退避机制,提出了一种增强型自适应慢速递减的EASDCF方案,并在此基础上的结合IEEE802.11e的业务分级的思想,通过最大竞争窗口和重传次数的不同来区分不同的优先级,并对每个优先级进行区分服务.仿真结果表明,EASDCF机制所采用的分级策略提高了时延敏感业务的吞吐量,并使丢包率敏感的数据业务得到可靠保障,该算法能够有效地增强网络的QoS,提高整个网络的性能.
針對IEEE802.11的媒體接入控製層QoS支持技術進行瞭研究.基于無線跼域網MAC層DCF和EDCF兩種退避機製,提齣瞭一種增彊型自適應慢速遞減的EASDCF方案,併在此基礎上的結閤IEEE802.11e的業務分級的思想,通過最大競爭窗口和重傳次數的不同來區分不同的優先級,併對每箇優先級進行區分服務.倣真結果錶明,EASDCF機製所採用的分級策略提高瞭時延敏感業務的吞吐量,併使丟包率敏感的數據業務得到可靠保障,該算法能夠有效地增彊網絡的QoS,提高整箇網絡的性能.
침대IEEE802.11적매체접입공제층QoS지지기술진행료연구.기우무선국역망MAC층DCF화EDCF량충퇴피궤제,제출료일충증강형자괄응만속체감적EASDCF방안,병재차기출상적결합IEEE802.11e적업무분급적사상,통과최대경쟁창구화중전차수적불동래구분불동적우선급,병대매개우선급진행구분복무.방진결과표명,EASDCF궤제소채용적분급책략제고료시연민감업무적탄토량,병사주포솔민감적수거업무득도가고보장,해산법능구유효지증강망락적QoS,제고정개망락적성능.
IEEE802.11 media access control layer QoS support technology is researched.Based on wireless local area network MAC layer two kind of backoff mechanism DCF and EDCF,an enhanced adaptive slow decrease EASDCF scheme is proposed,and based on this union the idea of service classification of IEEE802.11e,through the different of largest contention window and retry limit different priorities is distinguished,and different services is provided for each priority.Simulation results show the classification strategy adopted by EASDCF mechanism improve the throughput of delay sensitive service,and also makes packet drop rate sensitive data service to be a reliable guarantee.It prove that the algorithm effectively enhance the network QoS and improve the entire network performance.
